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Alice Programming

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Quiz on Random Numbers

After doing all parts of the lesson you should be able to answer these questions.

Write down the answers first. Click the to check your answer.

1. Given the code below, what values could number have?

   1 or 2, because it is from 0 to 3 exclusive

2. Given the code below, what values could num have?

   A random value from 10.0 to 11.0

3. Given the code below, what values could num have?

   A random value of 2, 3, 4, 5, 6, 7, 8 or 9

4. In the code below, how many different values can num have?

   11: 0,1,2,3,4,5,6,7,8,9,10

5. In this code, what does the bear comlain about most?

   He says I'm tired about 60% of the time.

6. If you want num to represent flipping a coin, what value should you give num?

   Any 2 values will work:

7. If you want to select a random amount to jump, what type should you use?

   double

8. If you want to select a random number of times to jump, what type should you use?

   integer

9. Which has more values RandomUtilities.nextIntegerFromAToBExclusive( 1, 3 ); or RandomUtilities.nextIntegerFromAToBInclusive( 1, 3 );

   Inclusive: it includes the values 1, 2, 3. Exclusive is just 2

10. Integer sayIt = RandomUtilities.nextIntegerFromAToBInclusive( 0, 3 );
A loop executes sayIt times. Is it possible that the loop exceutes 0 times?

   Yes, sayit can be 0.

Please review the material for any questions you miss.